Westinghouse DA-50 User manual
TABLE
OF
CONTENTS
DESCRIPTION
Part
One
Pages
6
-
22
*
-
Switchgear
Having
Types
DA
-
50
and
DA
-
75
Circuit
Breakers
Stationary
Structure
Removable
Element
Interlocks
Accessories
Inserting
the
Removable
Element
Removing
the
Element
Switchgear
Having
Type
DA
-
100
Circuit
Breakers
Stationary
Structure
Removable
Element
Inserting
the
Removable
Element
Removing
the
Element
Switchgear
Having
Type
DK
Circuit
Breakers
Interlocks
Inserting
the
Removable
Element
Removing
the
Element
Switchgear
Having
Types
DB
-
15
and
DB
-
25
Circuit
Breakers
Interlocks
'
Accessories
Inserting
the
Removable
Element
Removing
the
Element
7
7
9
10
10
10
13
13
13
15
15
.
16
16
16
16
18
18
18
i
19
20
21
RECEIVING
,
HANDLING
AND
STORING
Part
Two
Page
23
Receiving
Handling
.
Storing
.
.
.
23
23
23
INSTALLATION
Part
Three
Pages
24
-
27
Foundation
Placing
of
Stationary
Structure
Power
Connections
Ground
Connection
Control
Connections
Pre
-
operation
Checks
24
24
24
25
25
26
INSPECTION
AND
MAINTENANCE
Part
Four
Page
28
a
2
Courtesy of NationalSwitchgear.com
I
.
B
.
32
-
100
-
1
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
LIST
OF
ILLUSTRATIONS
Page
Figure
1
.
Front
View
of
Indoor
Metal
-
Enclosed
Switchgear
Containing
Types
DA
-
50
,
DA
-
75
and
DA
-
100
Electrically
-
Operated
and
Type
DA
-
50
Manually
-
Op
-
erated
Circuit
Breakers
as
Removable
Elements
2
.
Low
-
Voltage
Switchgear
Installed
in
an
Outdoor
Weather
-
proof
House
and
Arranged
for
Throat
Connection
to
a
Power
Transformer
to
Form
an
Out
-
door
Power
Center
3
.
View
of
Rear
Bus
Compartment
4
.
Micarta
Bus
Supports
Arranged
for
One
Bus
Bar
per
Phase
5
.
Micarta
Bus
Supports
Arranged
for
Two
Bus
Bars
per
Phase
6
.
Micarta
Bus
Supports
Arranged
for
Three
Bus
Bars
per
Phase
7
.
Compartment
for
Type
DA
-
50
Manually
-
Operated
Circuit
Breaker
8
.
Removable
Element
for
Type
DA
-
50
Manually
-
Operated
Circuit
Breaker
9
.
Compartment
for
Type
DA
-
50
Electrically
-
Operated
Circuit
Breaker
10
.
Removable
Element
for
Type
DA
-
50
Electrically
-
Operated
Circuit
Breaker
11
.
Compartment
for
Type
DA
-
75
,
2000
-
Ampere
Circuit
Breaker
12
.
Removable
Element
for
Type
DA
-
75
,
2000
-
Ampere
Circuit
Breaker
13
.
Levering
in
a
Type
DA
-
50
Manually
-
Operated
Removable
Element
14
.
Placing
Removable
Element
in
Compartment
by
use
of
a
Hoist
.
.
Not
that
Rail
Extension
and
Lifting
Brackets
are
in
Place
15
.
Placing
Removable
Element
in
Compartmmt
Using
the
Handling
Carriage
16
.
Automatic
Shutters
in
a
Type
DA
-
100
Compartment
,
Open
Position
17
.
Automatic
Shutters
in
a
Type
DA
-
100
Compartment
,
Closed
Position
18
.
Removable
Element
for
Type
DA
-
100
,
4000
-
Ampere
Circuit
Breaker
19
.
Compartment
for
Type
DA
-
100
,
5000
-
or
6000
-
Ampere
Circuit
Breaker
20
.
Removable
Element
for
Type
DA
-
100
,
5000
-
or
6000
-
Ampere
Circuit
Breaker
.
21
.
Levering
in
a
Type
DK
-
25
Removable
Element
22
.
Compartment
for
Type
DK
-
25
Circuit
Breaker
23
.
Removable
Element
for
Type
DK
-
25
Circuit
Breaker
24
.
Switchgear
Containing
Types
DB
-
15
and
DB
-
25
Removable
Elements
25
.
Compartment
for
Type
DB
-
15
Circuit
Breaker
26
.
Removable
Element
for
Type
DB
-
18
Circuit
Breaker
27
.
Compartment
for
Type
DB
-
25
Circuit
Breaker
28
.
Removable
Element
for
Type
DB
-
25
Circuit
Breaker
29
.
Type
DB
-
25
Element
in
Position
for
Inserting
in
Compartment
30
.
Inserting
a
Type
DB
-
25
Removable
Element
31
.
Metal
-
Enclosed
Switchgear
Prepared
for
Shipment
32
.
Dimensions
for
Locating
Stationary
Structure
33
.
Suggested
Methods
for
Fastening
Housing
to
Floor
Channels
6
6
7
7
7
7
8
8
9
9
11
11
12
13
V
.
^
13
14
14
14
15
18
16
17
17
18
19
19
20
20
21
21
23
24
25
3
Courtesy of NationalSwitchgear.com
I
.
B
.
32
-
100
-
1
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
LIST
OF
ILLUSTRATIONS
3
Page
Figure
1
.
Front
View
of
Indoor
Metal
-
Enclosed
Switchgear
Containing
Types
DA
-
50
,
DA
-
75
and
DA
-
100
Electrically
-
Operated
and
Type
DA
-
50
Manually
-
Op
-
erated
Circuit
Breakers
as
Removable
Elements
2
.
Low
-
Voltage
Switchgear
Installed
in
an
Outdoor
Weather
-
proof
House
and
Arranged
for
Throat
Connection
to
a
Power
Transformer
to
Form
an
Out
-
door
Power
Center
3
.
View
of
Rear
Bus
Compartment
4
.
Micarta
Bus
Supports
Arranged
for
One
Bus
Bar
per
Phase
5
.
Micarta
Bus
Supports
Arranged
for
Two
Bus
Bars
per
Phase
6
.
Micarta
Bus
Supports
Arranged
for
Three
Bus
Bars
per
Phase
7
.
Compartment
for
Type
DA
-
50
Manually
-
Operated
Circuit
Breaker
8
.
Removable
Element
for
Type
DA
-
50
Manually
-
Operated
Circuit
Breaker
9
.
Compartment
for
Type
DA
-
50
Electrically
-
Operated
Circuit
Breaker
10
.
Removable
Element
for
Type
DA
-
50
Electrically
-
Operated
Circuit
Breaker
11
.
Compartment
for
Type
DA
-
75
,
2000
-
Ampere
Circuit
Breaker
12
.
Removable
Element
for
Type
DA
-
75
,
2000
-
Ampere
Circuit
Breaker
13
.
Levering
in
a
Type
DA
-
50
Manually
-
Operatea
Removable
Element
14
.
Placing
Removable
Element
in
Compartment
by
use
of
a
Hoist
.
Not
that
Rail
Extension
and
Lifting
Brackets
are
in
Place
15
.
Placing
Removable
Element
in
Compartmrnt
Using
the
Handling
Carriage
16
.
Automatic
Shutters
in
a
Type
DA
-
100
Compartment
,
Open
Position
17
.
Automatic
Shutters
in
a
Type
DA
-
100
Compartment
,
Closed
Position
18
.
Removable
Element
for
Type
DA
-
100
,
4000
-
Ampere
Circuit
Breaker
19
.
Compartment
for
Type
DA
-
100
,
5000
-
or
6000
-
Ampere
Circuit
Breaker
20
.
Removable
Element
for
Type
DA
-
100
,
5000
-
or
6000
-
Ampere
Circuit
Breaker
.
21
.
Levering
in
a
Type
DK
-
25
Removable
Element
22
.
Compartment
for
Type
DK
-
25
Circuit
Breaker
23
.
Removable
Element
for
Type
DK
-
25
Circuit
Breaker
24
.
Switchgear
Containing
Types
DB
-
15
and
DB
-
25
Removable
Elements
25
.
Compartment
for
Type
DB
-
15
Circuit
Breaker
26
.
Removable
Element
for
Type
DB
-
18
Circuit
Breaker
27
.
Compartment
for
Type
DB
-
25
Circuit
Breaker
28
.
Removable
Element
for
Type
DB
-
25
Circuit
Breaker
29
.
Type
DB
-
25
Element
in
Position
for
Inserting
in
Compartment
30
.
Inserting
a
Type
DB
-
25
Removable
Element
31
.
Metal
-
Enclosed
Switchgear
Prepared
for
Shipment
32
.
Dimensions
for
Locating
Stationary
Structure
33
.
Suggested
Methods
for
Fastening
Housing
to
Floor
Channels
6
6
7
7
7
7
8
8
9
9
11
11
12
/
-
V
;
13
13
14
14
14
15
18
16
17
17
18
19
19
20
20
21
21
23
24
25
3
Courtesy of NationalSwitchgear.com
I
.
B
.
32
-
100
-
1
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
/
Low
-
Voltage
METAL
-
ENCLOSED
SWITCHGEAR
This
instruction
book
has
been
prepared
to
familiarize
the
purchaser
'
s
engineering
and
operating
staff
with
the
low
-
voltage
(
600
volts
or
lower
)
metal
-
enclosed
switchgear
supplied
by
Westinghouse
.
The
information
con
-
tained
herein
should
be
carefully
studied
before
attempting
to
install
or
operate
the
equipment
.
Proper
installation
,
operation
and
maintenance
are
necessary
to
assure
continued
satisfactory
service
from
the
equipment
.
It
should
not
be
installed
in
places
where
it
will
be
called
upon
to
operate
at
voltages
or
currents
greater
than
those
for
which
it
was
designed
.
For
instructions
pertaining
to
a
particular
piece
of
apparatus
supplied
as
part
of
the
switchgear
equipment
,
refer
to
the
instruction
book
or
leaflet
ap
-
plying
to
that
particular
type
of
apparatus
.
Copies
of
the
applicable
publica
-
tions
are
furnished
along
with
this
book
for
each
switchgear
installation
.
Only
authorized
and
properly
trained
personnel
should
be
permitted
to
operate
or
handle
any
portion
of
the
switchgear
.
Caution
:
T
&
5
Courtesy of NationalSwitchgear.com
I
PART
ONE
r
5
t
»
FIG
.
1
.
Front
View
of
Indoor
Metal
-
Enclosed
Switchgear
Containing
Types
DA
-
50
,
DA
-
75
and
DA
-
100
Electrically
-
Operated
and
Type
DA
-
50
Manually
-
Operated
Circuit
Breakers
as
Removable
Elements
Low
-
voltage
(
600
volts
or
lower
)
indoor
and
out
-
door
metal
-
enclosed
switchgear
having
drawout
-
mounted
type
DB
,
DK
or
DA
air
circuit
breakers
is
completely
factory
assembled
and
tested
.
It
is
arranged
for
the
minimum
amount
of
labor
for
installation
.
See
Figs
.
1
and
2
.
Shipments
are
made
completely
assembled
or
in
sections
of
one
or
more
housings
to
suit
the
handling
facilities
at
the
point
of
installation
.
The
switchgear
consists
of
a
fixed
part
called
the
stationary
structure
,
and
drawout
-
type
circuit
breakers
called
the
removable
elements
.
The
switch
-
gear
provides
for
three
positions
,
"
operating
"
,
"
test
"
,
and
"
disconnect
"
,
of
the
removable
element
.
In
the
"
operating
"
position
,
both
the
primary
and
secondary
disconnecting
devices
are
engaged
,
and
the
circuit
breaker
is
ready
for
operation
.
In
the
"
test
"
position
,
only
the
secondary
discon
-
necting
devices
are
engaged
,
and
the
circuit
breaker
can
be
operated
without
energizing
the
power
circuit
.
In
the
"
disconnect
"
position
,
both
the
primary
and
secondary
disconnecting
devices
[
IT
-
1
-
-
V
-
*
3
saiga
.
»
•
-
i
i
n
"
js
I
~
0
QB
isa
i
:
21
•
r
O
—
—
«
.
•
g
II
c
nimn
t
;
i
<
a
TG
.
2
.
•
oor
Weatherproof
House
and
Arranged
for
Throat
Connection
to
a
Power
Transformer
to
Form
an
Outdoor
Power
Center
Low
-
Voltage
Switchgear
Installed
in
an
Out
-
*
v
-
6
Courtesy of NationalSwitchgear.com
I
.
B
.
32
-
100
-
1
DESCRIPTION
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
are
disengaged
and
the
entire
circuit
breaker
is
isolated
.
msi
SWITCHGEAR
HAVING
TYPES
DA
-
50
AND
DA
-
75
CIRCUIT
BREAKERS
Stationary
Structure
.
The
stationary
struc
-
ture
is
an
assembly
of
one
or
more
steel
housings
,
each
consisting
of
a
formed
and
welded
front
en
-
closure
containing
the
circuit
breaker
compart
-
ments
,
and
a
rear
enclosure
for
the
bus
copper
,
cables
,
instrument
transformers
and
other
detail
equipment
.
See
Fig
.
3
.
The
front
compartments
are
completely
enclosed
,
segregating
each
circuit
breaker
from
the
other
breakers
.
Each
circuit
breaker
compartment
is
provided
with
the
main
stationary
contacts
and
a
rail
along
each
side
for
supporting
the
removable
element
.
These
rails
permit
the
removable
element
to
be
moved
between
the
"
operating
'
'
and
"
disconnect
"
positions
,
with
a
positive
stop
for
each
position
,
and
by
use
of
the
rail
extensions
,
completely
out
of
the
compartment
.
Micarta
Bus
Supports
Arranged
for
Three
Bus
Bars
per
Phase
7
Courtesy of NationalSwitchgear.com
DESCRIPTION
«
Ci
STATIONARY
FOTO
OF
SECONDARY
LD
N
ECTJNG
.
’
DEVICE
pjt
.
4
ili
i
?
.
.
z
.
*
•
—
*
T
'
S
5
T
1
"
TGROUND
SHOE
3
£
sea
*
rvr
»
1
»
~
»
5
*
-
FAILS
FOR
SUPPORT
^
?
OF
REMOVABLE
ELEMEN
'
ySM
P
3
gss
©
£
m
_
Sti
SMIEI
OT
pop
ING
DEVICE
•
a
:
*
C
i
'
r
<
sJ
?
V
-
'
'
^
^
pr
I
£
r
'
-
r
5
^
«
^
:
„
STATIONARY
PORTlONig
OF
PRIMARY
•
DISCONNECTING
DEVICE
^
J
]
DOOR
INTERLOCK
!
-
IT
V
*
7
!
,
1
Q
Lr
’
-
J
FIG
.
7
.
Compartment
for
Type
DA
-
50
Manually
-
Operated
Circuit
Breaker
GROUND
FINGERS
-
r
.
~
HUc
it
INTERLOCK
*
9
:
.
!
t
MOVABLE
^
/
PORTION
OF
/
PRIMARY
DlS
-
/
\
CONNECTING
DEVICE
TARGET
f
\
WHEELS
FOR
SUPPORTING
/
REMOVABLE
1
/
ELEMENT
.
ON
Y
COMPARTMENT
Ur
-
RAILS
*
•
f
-
±
*
L
P
LEVERING
DEVICE
m
t
/
i
4
MANUAL
TRIP
BUTTON
POSITIONING
STOP
!
i
ROLLER
ENGAGES
WITH
CLOSING
\
LEVER
IN
COMPARTMENT
DOOR
\
SOCKET
FOR
EMERGENCY
CLOSING
LEVER
FIG
.
6
.
The
rear
enclosure
is
made
up
ot
the
rear
frames
,
tie
members
,
top
sheets
and
rear
covers
,
all
bolted
together
and
to
tne
real
of
the
iront
compartment
,
xhe
rows
of
square
holes
which
are
punched
in
the
rear
frame
,
tie
memoers
.
and
the
rear
flange
of
the
front
compartment
permit
cnanges
and
additions
to
be
made
without
cutting
,
welding
or
drilling
.
The
universal
type
Micaria
DUS
support
blocks
can
be
arranged
to
permit
the
use
of
one
,
two
or
three
bars
per
phase
Thus
,
by
a
simple
re
-
ar
-
1
!
8
1
Courtesy of NationalSwitchgear.com
i
.
B
.
32
-
100
-
1
DESCRIPTION
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
rangement
of
the
insulating
blocks
,
additional
cop
-
per
bars
may
be
added
to
the
bus
in
the
held
as
future
load
requirements
dictate
.
Figs
.
4
,
5
and
6
illustrate
the
arrangements
of
the
Micarta
blocks
for
one
,
two
and
three
bars
per
phase
,
respectively
.
When
automatic
shutters
are
supplied
for
type
DA
-
75
circuit
breaker
compartments
,
they
close
and
isolate
the
fixed
portion
of
the
primary
dis
-
connecting
devices
when
the
removable
element
is
withdrawn
.
These
shutters
are
arranged
to
close
when
the
removable
element
is
approximately
half
withdrawn
from
the
cell
.
The
removable
ele
-
ment
consists
of
the
air
circuit
breaker
equipped
with
primary
and
secondary
disconnecting
devices
,
Removable
Element
.
L
’
AT
10
NARY
PORTION
OP
PRIMARY
DISCONNECTING
DEVICE
ROUND
?
I I
HOE
RAILS
FOR
SUPPORT
OF
REMOVABLE
ELEMENT
FOR
LEVERING
DEVICE
T
'
31
'
I
30
m
'
1
St
-
i
FDOOR
^
T
IsTAT
10
NAR
YlPORBONSOF
^
s
m
EDONDARY
-
DISCONNECTING
.
OEyiC
-
*
r
'
8
RACKET
FOR
4
POSITIONING
STOP
i
GROUND
FINGERS
TARGET
MANUAL
TRIP
BUTTON
SOLENOID
OPERATING
MECHANISM
AUXILIARY
SWITCH
CONTROL
RELAY
FIG
.
10
.
Courtesy of NationalSwitchgear.com
DESCRIPTION
an
operating
mechanism
,
trip
button
,
position
indi
-
tor
and
interlocks
,
all
mounted
upon
a
supporting
trame
or
truck
.
The
truck
is
provided
with
wheels
which
engage
the
side
rails
in
the
compartment
to
support
and
guide
the
removable
element
.
All
re
-
movable
elements
,
except
the
manually
-
ope
rated
type
DA
-
50
,
have
their
trucks
mounted
on
wheels
so
that
they
may
be
rolled
on
the
floor
.
Each
removable
element
is
provided
with
a
positioning
stop
located
as
shown
in
Figs
.
8
,
10
and
12
.
The
positioning
stop
engages
slots
on
a
bracket
in
the
compartment
to
lock
the
removable
element
in
each
of
the
three
positions
.
See
Figs
.
7
,
9
and
11
.
A
levering
device
,
mounted
on
each
side
of
the
removable
element
truck
,
is
used
in
moving
the
element
while
the
primary
disconnecting
devices
are
in
contact
.
The
levering
action
is
obtained
by
rotating
a
shaft
having
an
eccentrically
mounted
pin
on
each
end
.
The
pins
engage
slots
on
each
side
of
the
compartment
.
The
shaft
is
rotated
by
the
emergency
closing
handle
for
the
circuit
breakers
.
The
levering
device
is
shown
in
Figs
.
*
10
and
12
.
A
ground
clip
may
be
mounted
on
the
rear
of
the
removable
element
to
contact
the
compartment
ground
shoe
when
the
element
is
inserted
into
,
or
beyond
,
the
"
test
"
position
.
.
Interlocks
.
The
front
hinged
door
of
the
circuit
breaker
compartment
is
interlocked
with
the
re
-
movable
element
so
that
it
cannot
be
opened
while
the
circuit
breaker
is
closed
and
so
that
the
circuit
breaker
cannot
be
closed
in
the
"
operating
"
posi
-
tion
while
the
door
is
open
.
An
interlock
between
the
compartment
and
the
removable
element
will
automatically
trip
the
circuit
breaker
if
an
attempt
is
made
to
move
the
element
either
into
or
out
of
the
"
operating
"
position
while
the
circuit
breaker
is
closed
.
This
interlock
also
prevents
closing
the
circuit
breaker
when
the
re
-
movable
element
is
at
any
point
between
the
"
test
"
and
"
operating
'
'
positions
.
Accessories
.
An
emergency
hand
closing
lever
and
a
pair
of
lifting
brackets
are
furnished
as
standard
accessories
with
each
switchgear
as
-
embly
.
In
addition
,
a
pair
of
rail
extensions
is
supplied
for
switchgear
assemblies
containing
type
DA
-
50
manually
-
operated
circuit
breakers
or
type
DA
-
50
electrically
-
operated
breakers
mounted
in
upper
compartments
.
The
emergency
closing
lever
is
inserted
in
the
socket
on
the
circuit
breaker
operating
mechanism
for
closing
,
and
should
be
removed
after
the
closing
operation
.
The
lever
is
also
used
to
lever
the
re
-
movable
element
into
or
out
of
the
"
operating
"
position
.
This
is
shown
in
Fig
.
13
.
The
lifting
brackets
attach
to
slots
on
the
sides
of
the
truck
and
are
used
to
facilitate
the
lifting
of
the
removable
element
with
a
hoist
.
The
rail
extensions
,
when
required
,
are
attached
to
the
compartment
rails
for
convenience
in
com
-
pletely
withdrawing
the
removable
element
from
the
compartment
.
For
floor
-
wheeled
removable
elements
mounted
in
the
lower
compartments
,
the
rail
extensions
are
not
required
.
Fig
.
14
illustrates
the
use
of
the
lifting
brackets
and
extension
rails
when
handling
a
type
DA
-
50
removable
element
with
a
hoist
.
The
handling
carriage
for
type
DA
-
50
circuit
breakers
,
illustrated
in
Fig
.
15
,
is
an
additional
accessory
available
and
furnished
on
special
order
.
for
use
where
other
hoisting
facilities
are
not
avail
-
able
.
The
carriage
is
equipped
with
rails
which
connect
to
the
compartment
rails
by
means
of
latches
.
After
the
removable
element
is
transferred
from
the
compartment
to
the
handling
carriage
,
it
may
be
lowered
or
raised
by
means
of
the
crank
on
the
carriage
.
Inserting
the
Removable
Element
.
The
following
procedure
should
be
followed
when
placing
a
type
DA
-
50
manual
removable
element
in
the
compartment
by
the
use
of
a
chain
hoist
.
1
.
Open
the
compartment
door
and
attach
the
rail
extensions
to
the
compartment
rails
.
2
.
Attach
the
lifting
brackets
to
the
removable
element
.
3
.
Lift
the
removable
element
and
place
it
on
the
rail
extensions
as
shown
in
Fig
.
14
.
4
.
Remove
the
lifting
brackets
.
5
.
Manually
push
the
removable
element
into
the
compartment
until
the
positioning
stop
engages
and
holds
the
element
in
the
"
disconnect
"
position
.
6
.
Remove
the
rail
extensions
.
10
Courtesy of NationalSwitchgear.com
!
.
B
.
32
-
100
-
1
DESCRIPTION
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
L
l
A
fe
>
3
f
STATIONARY
PORTION
OF
PRIMARY
DISCONNECTING
DEVICE
-
’
.
'
/
JJL
STATIONARY
PORTION
OF
SECONDARY
DISCONNECTING
DEVICES
®
MOVABLE
PORTION
OF
PRIMARY
DISCONNECTING
.
WHEELS
FOR
SUP
-
PORTING
rREMOVA
8
LE
ELEMENT
ON
COM
-
PARTMENT
RAILS
DEVICE
TARGET
CONTROL
RELAY
CONTROL
CIRCUIT
CUTOUT
SWITCH
LEVERING
DEVICE
POSITION
-
ING
STOP
AUXILIARY
SWITCH
MANUAL
TRIP
BUTTON
SOLENOID
OPERATING
MECHANISM
GROUNO
FINGERS
MOVABLE
PORTION
OF
SECONDARY
DISCONNECTING
DEVICE
TIC
.
\
2
Removable
Element
for
Type
DA
-
75
.
EQ
0
Q
-
Ampere
Circuit
Breaker
11
Courtesy of NationalSwitchgear.com
DESCRIPTION
holds
the
removable
element
in
the
"
operating
'
'
position
.
11
.
Close
and
fasten
the
compartment
door
.
When
closing
the
door
,
rotate
the
manual
operating
mechanism
on
the
door
until
the
yoke
on
the
mech
-
anism
engages
the
roller
on
the
circuit
breaker
.
The
following
procedure
should
be
used
if
an
elevating
carriage
is
used
in
place
of
a
chain
hoist
:
1
.
Lower
the
rails
of
the
handling
carriage
sufficiently
to
permit
the
carriage
to
be
wheeled
to
a
position
where
the
rails
slide
under
the
wheels
on
the
removable
element
.
2
.
The
element
should
be
moved
on
the
handling
carriage
rails
to
the
position
where
the
positioning
pin
drops
into
the
slot
on
the
carriage
.
3
.
Raise
the
element
,
by
means
of
the
crank
on
the
carriage
,
to
the
desired
elevation
.
4
.
Wheel
the
carriage
into
position
so
that
the
carriage
rails
can
be
latched
to
the
compartment
rails
.
Care
should
be
taken
that
the
carriage
rails
are
latched
to
the
compartment
before
attempting
to
move
the
element
.
The
extension
rails
are
not
required
when
using
the
handling
carriage
.
5
.
Release
the
stop
holding
the
removable
ele
-
ment
in
place
on
the
handling
carriage
and
man
-
ually
push
the
element
into
the
compartment
until
the
positioning
stop
engages
in
the
"
disconnect
"
position
(
See
Fig
.
15
)
.
6
.
Release
the
latches
and
remove
the
handling
carriage
.
The
remaining
steps
are
the
same
as
given
in
paragraphs
7
through
11
on
this
page
.
Manual
emergency
closing
of
type
DA
-
50
elec
-
trically
-
operated
circuit
breakers
and
type
DA
-
75
circuit
breakers
in
the
"
operating
"
position
is
ac
-
complished
by
inserting
the
emergency
closing
handle
into
the
socket
on
the
circuit
breaker
closing
mechanism
through
the
slot
in
the
com
-
partment
door
.
The
rotary
closing
handle
,
mounted
on
the
front
compartment
door
for
manually
-
operated
type
DA
-
50
circuit
breakers
,
does
not
move
when
the
circuit
breaker
is
tripped
,
either
manually
or
auto
-
matically
.
To
close
the
circuit
breaker
manually
,
with
the
breaker
in
the
"
operating
"
position
and
"
2
*
-
7
*
«
r
~
(
1
j
-
'
'
>
r
1
7
-
~
ri
1
FIG
.
13
.
Levering
in
a
Type
DA
-
50
Manually
-
Operated
Removable
Element
7
.
Release
the
positioning
stop
by
depressing
the
lever
on
the
right
side
of
the
truck
and
push
the
removable
element
further
into
the
compart
-
ment
until
the
positioning
stop
again
engages
and
holds
the
element
in
the
"
test
"
position
.
8
.
Close
and
trip
the
circuit
breaker
by
means
of
the
emergency
closing
handle
and
trip
button
,
and
check
its
operation
in
general
.
9
.
Release
the
positioning
stop
and
push
the
removable
element
into
the
compartment
until
the
levering
device
engages
the
slots
in
the
side
of
the
cell
.
10
.
Insert
the
emergency
hand
-
closing
lever
in
the
socket
of
the
levering
device
and
raise
it
(
See
Fig
.
13
)
until
the
positioning
stop
engages
and
12
Courtesy of NationalSwitchgear.com
I
.
B
.
32
-
100
-
1
DESCRIPTION
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
4
.
Depress
the
positioning
stop
lever
and
pull
^
-
the
element
onto
the
extension
rails
.
Attach
the
lifting
brackets
,
hoist
the
removable
element
off
the
rails
and
lower
it
to
the
floor
.
When
using
the
handling
carriage
to
remove
an
element
,
the
procedure
is
similar
except
that
the
carriage
rails
are
latched
in
position
instead
of
the
extension
rails
described
in
step
2
.
aSS
i
SWITCHGEAR
HAVING
TYPE
DA
-
100
CIRCUIT
BREAKERS
0
:
'
:
?
The
construction
of
the
switchgear
having
type
DA
-
100
removable
elements
is
slightly
different
from
that
previously
described
for
the
types
DA
-
50
*
and
DA
-
75
switchgear
.
*
Stationary
Structure
.
The
stationary
struc
-
ture
is
an
assembly
of
one
or
more
steel
housings
,
each
consisting
of
a
front
circuit
breaker
com
-
partment
and
a
rear
bus
enclosure
.
The
housing
is
—
a
-
complete
welded
structure
,
fabricated
from
steel
sheets
and
angles
,
in
contrast
to
the
bolted
FIG
.
14
.
Placing
Removable
Element
in
Compartment
by
use
o
£
a
Hoist
.
Note
that
Rail
Extensions
and
Lifting
Brackets
are
in
Place
C
the
compartment
door
closed
,
the
handle
must
be
rotated
counter
-
clockwise
until
the
breaker
closing
mechanism
latches
,
and
then
rotated
clockwise
until
the
circuit
breaker
latches
closed
.
When
inserting
type
DA
-
50
electric
or
type
DA
-
75
removable
elements
,
the
trucks
of
which
are
mounted
on
wheels
,
the
rail
extensions
are
not
used
,
and
the
element
is
rolled
directly
from
the
floor
onto
the
compartment
rails
,
after
which
the
procedure
is
the
same
as
described
for
the
manual
type
DA
-
50
circuit
breaker
.
Removing
ihe
Element
.
The
following
procedure
should
be
followed
in
removing
the
type
DA
-
50
manual
removable
element
.
1
.
Trip
the
circuit
breaker
and
open
the
com
-
partment
door
.
2
.
Attach
the
rail
extensions
and
insert
the
levering
handle
.
3
.
Disengage
the
positioning
stop
and
pull
down
on
the
levering
device
handle
until
it
reaches
the
limit
of
its
travel
.
Remove
the
levering
handle
.
FIG
.
15
.
Placing
Removable
Element
in
Compartment
using
the
Handling
Carriage
13
Courtesy of NationalSwitchgear.com
DESCRIPTION
t
'
s
1
S
’
3
i
‘
i
i
I
0
0
©
©
©
I
©
!
0
©
©
©
|
a
j
Automatic
Shutters
in
a
Type
DA
-
100
Corn
-
Automatic
Shutters
in
a
Type
DA
-
100
Com
-
partment
.
Closed
Position
partment
.
Open
Position
-
MOVABLE
PORTION
OF
PRIMARY
POSITIONING
DISCONNECTING
DEVICE
STOP
LEVERING
DEVICE
t
MANUAL
TRIP
BUTTON
I
CONTROL
RELAYS
GROUND
FINGERS
SWITCH
SOLENOID
MOVABLE
PORTION
OF
SECONDARY
DISCONNECTING
DEVICE
OPERATING
MECHANISM
CONTROL
CIRCUIT
CUTOUT
SWITCH
FIG
.
18
.
Removable
Element
for
Type
DA
-
100
.
400
C
-
Ampere
Circuit
Breaker
14
Courtesy of NationalSwitchgear.com
I
.
B
.
32
-
100
-
1
DESCRIPTION
,
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
release
only
when
moving
away
from
the
"
test
"
position
.
No
lifting
brackets
or
extension
rails
are
furnished
or
required
for
type
DA
-
100
units
.
Inserting
the
Removable
Element
.
1
.
Open
the
compartment
door
and
roll
the
element
into
the
compartment
until
the
roller
on
the
movable
portion
of
the
levering
device
engages
the
compartment
portion
of
the
device
.
2
.
Attach
the
hand
crank
to
the
truck
levering
device
and
turn
in
a
clockwise
direction
until
the
element
reaches
the
"
test
"
position
.
At
this
point
a
pin
will
drop
into
a
slot
on
the
levering
device
,
preventing
further
travel
of
the
element
.
3
.
Close
and
trip
the
circuit
breaker
by
means
of
the
emergency
closing
handle
and
trip
button
,
and
check
its
operation
in
general
.
4
.
Raise
the
pin
to
release
it
from
the
slot
,
and
continue
to
rotate
the
crank
in
a
clockwise
direc
-
tion
until
the
element
is
in
the
"
operating
"
position
.
On
the
5000
-
and
6000
-
ampere
removable
ele
-
ments
,
two
gear
ratios
are
provided
on
the
levering
device
.
After
the
main
contacts
on
the
element
have
started
to
engage
the
stationary
main
con
-
tacts
in
the
compartment
,
the
crank
should
be
removed
from
the
upper
position
and
transferred
Compartment
for
Type
DA
-
100
,
5000
-
or
6000
-
Ampere
Circuit
Breaker
FIG
.
19
.
type
of
construction
used
on
the
DA
-
50
and
DA
-
75
switchgear
housings
.
The
side
sheets
extend
from
the
front
to
the
rear
,
thus
providing
complete
segregation
between
units
,
even
in
the
rear
bus
The
main
copper
bus
is
carried
ir
-
'
A
*
compartment
,
between
units
through
,
heavy
Micarta
supports
bolted
over
rectangular
openings
in
the
side
sheets
.
The
front
circuit
breaker
compartment
is
similar
to
that
supplied
for
DA
-
50
and
DA
-
75
switchgear
except
that
there
are
no
side
rails
for
rolling
in
the
removable
element
.
The
removable
element
truck
POSITIONING
is
equipped
with
wheels
which
rest
on
the
bottom
steel
members
of
the
compartment
when
the
ele
-
ment
is
in
place
.
The
same
safety
interlocks
are
furnished
as
described
for
the
types
DA
-
50
and
DA
-
75
circuit
breakers
.
See
Figs
.
16
and
17
for
the
shutters
supplied
as
optional
equipment
on
DA
-
100
switchgear
.
LEVERING
DEVICE
MANUAL
TRIP
8
UTT
0
N
CONTROL
RELAY
Removable
Element
.
ment
consists
of
the
circuit
breaker
mounted
in
a
rigid
truck
constructed
of
welded
steel
angles
.
The
levering
device
is
arranged
so
that
it
moves
the
removable
element
between
the
"
disconnect
"
and
"
operating
"
positions
,
and
is
operated
by
a
removable
hand
crank
through
a
worm
and
gear
(
See
Figs
.
18
and
20
)
.
The
positioning
stop
is
built
into
the
levering
device
and
requires
a
manual
The
removable
ele
-
S
0
LEN
0
ID
OPERAT
-
ING
MECHANISM
AUXILIARY
SWITCH
CONTROL
CIRCUIT
CUTOUT
SWITCH
Removable
Element
for
Type
DA
-
100
,
5000
-
or
6000
-
Ampere
Circuit
Breaker
FIG
.
20
.
15
Courtesy of NationalSwitchgear.com
?
DESCRIPTION
disengaged
,
after
which
the
crank
is
transferred
to
the
upper
position
and
rotated
in
a
counter
-
clockwise
direction
)
.
3
.
Raise
the
stop
pin
and
continue
to
rotate
the
crank
in
a
counter
-
clockwise
direction
until
the
element
is
in
the
"
disconnect
"
position
.
"
r
.
rr
.
SI
saaem
IOISHEIHS
SWITCHGEAR
HAVING
TYPE
DK
CIRCUIT
BREAKERS
*
1
pUplHslil
The
general
features
of
type
DK
-
15
and
type
DK
-
25
drawout
switchgear
are
essentially
the
same
as
explained
previously
for
the
type
DA
-
50
switch
-
gear
.
Both
the
manually
-
operated
and
electrically
-
operated
circuit
breakers
are
mounted
in
the
same
type
of
truck
,
and
because
of
the
relatively
small
size
and
light
weight
,
floor
wheels
are
not
included
on
these
trucks
.
The
side
handles
permit
the
re
-
movable
element
to
be
lifted
either
manually
,
or
by
means
of
a
hoist
,
with
no
lifting
brackets
re
-
quired
.
Interlocks
.
The
interlocks
between
the
com
-
partment
and
removable
element
for
type
DK
switchgear
are
similar
to
those
described
previously
for
switchgear
containing
types
DA
-
50
and
DA
-
75
circuit
breakers
,
except
that
the
compartment
door
is
not
locked
while
the
circuit
breaker
is
closed
.
If
an
attempt
is
made
to
open
the
door
while
the
circuit
breaker
is
closed
,
the
circuit
breaker
will
automatically
trip
when
the
door
has
been
opened
approximately
25
degrees
.
ia
«
•
3
&
SS
*
FIG
.
21
.
Levering
in
a
Type
DK
-
25
Removable
Element
to
the
lower
position
.
Tne
crank
is
then
rotated
in
a
counter
-
clockwise
direction
until
the
element
The
higher
reaches
the
"
operating
'
position
,
gear
ratio
obtained
with
the
crank
in
the
lower
Inserting
the
Removable
Element
.
1
.
Open
the
compartment
door
and
attach
the
rail
extensions
.
See
Fig
.
22
.
2
.
Lift
removable
element
and
place
it
on
the
rail
extensions
.
3
.
Push
the
removable
element
into
the
com
-
partment
until
the
positioning
stop
drops
into
the
first
slot
,
thus
holding
the
element
in
the
"
discon
-
nect
"
position
.
4
.
Remove
the
rail
extensions
.
5
.
Release
the
positioning
stop
pin
and
push
the
removable
element
further
into
the
compart
-
ment
until
the
pin
engages
the
second
slot
,
thus
holding
the
element
in
the
"
test
"
position
.
6
.
Close
and
trip
the
circuit
breaker
and
check
position
makes
it
easier
to
lever
the
element
into
the
"
operating
"
position
.
5
.
Remove
the
hand
crank
.
Close
and
fasten
the
compartment
door
.
Removing
the
Element
.
1
.
Trip
the
circuit
breaker
and
open
the
com
-
partment
door
.
2
.
Attach
the
hand
crank
and
rotate
counter
-
clockwise
until
the
levering
device
pm
drops
into
the
slot
in
the
"
test
'
position
.
(
For
the
5000
-
or
~
000
-
ampere
circuit
breakers
,
the
crank
is
first
attached
in
the
lower
position
and
rotated
in
a
clockwise
direction
until
the
mam
contacts
are
;
;
«
9
I
16
Courtesy of NationalSwitchgear.com
I
.
B
.
32
-
100
-
1
DESCRIPTION
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
STATI
ON
A
J
PRIMARY
i
SfcFOH
10
NING
'
-
-
QR
-
•
\
-
-
r
Sp
-
>
“
i
EXTENSIONS
3
>
:
DOOR
INTERLOCK
and
Without
Rail
Extensions
(
right
)
The
circuit
breaker
is
8
.
Insert
the
levering
device
into
the
rails
and
removable
element
truck
.
Lift
up
on
-
the
levering
handle
until
the
positioning
stop
engages
the
las
'
slot
and
holds
the
element
in
the
"
operating
"
posi
-
tion
.
See
Fig
.
21
.
9
-
Remove
the
levering
device
.
Close
and
latch
the
compartment
door
.
its
operation
in
general
,
closed
by
rotating
the
operating
handle
in
a
clock
-
wise
direction
and
tripped
by
turning
the
handle
in
the
opposite
direction
.
7
.
Release
the
positioning
stop
pin
and
push
the
element
into
the
compartment
until
the
movable
and
stationary
portions
of
the
primary
disconnecting
devices
start
to
engage
.
MOVABLE
PORTION
OF
SECONDARY
DISCONNECTING
DEVICE
l
LIFTING
HANDLE
i
MOTOR
•
OPERATING
MECHANISM
i
x
ZA
m
WHEELS
FOR
SUPPORTING
REMOVABLE
ELEMENT
ON
COMPARTMENT
RAILS
A
i
MANUAL
OPERATING
HANDLE
MOVABLE
i
PORTION
OF
PRIMARY
DISCONNECTING
DEVICE
—
TARGET
GROUND
FINGER
t
Vj
+
2
FIG
.
23
.
Removable
Element
for
Type
DK
-
25
Circuit
Breaker
17
Courtesy of NationalSwitchgear.com
DESCRIPTION
4
>
y
3
.
-
'
•
-
1
il
If
o
=
m
=
m
=
m
ui
=
m
=
m
=
*
i
;
-
'
j
.
w
fS
,
l
-
r
*
30
.
.
£
5
IWafrrr
-
15
and
DB
-
25
Removable
Elements
Removing
the
Element
.
1
.
Trip
the
circuit
breaker
and
open
the
com
-
partment
door
.
2
.
Insert
the
levering
device
handle
.
3
.
Release
the
positioning
stop
and
pull
down
on
the
levering
handle
until
it
reaches
the
limit
of
its
travel
,
and
then
remove
the
levering
device
.
4
.
Attach
the
rail
extensions
.
5
.
Release
the
positioning
stop
and
pull
the
element
out
on
the
rail
extensions
.
6
.
Lift
the
removable
element
off
the
rails
.
7
.
Remove
the
rail
extensions
.
Close
and
fasten
the
compartment
door
.
the
DB
-
15
and
DB
-
25
circuit
breakers
.
DB
-
25
breaker
,
the
four
wheels
which
engage
the
compartment
rails
are
mounted
directly
on
the
sides
of
the
circuit
breaker
assembly
,
while
for
the
DB
-
15
breaker
the
two
rear
wheels
are
on
the
break
-
er
assembly
,
and
the
two
front
wheels
are
mounted
on
the
sides
of
the
compartment
.
For
either
type
of
breaker
,
the
lifting
bracket
is
permanently
mounted
at
the
top
of
the
breaker
assembly
.
See
Figs
.
26
and
28
.
A
set
of
conjunction
parts
may
be
used
to
adapt
a
type
DB
-
25
compartment
for
use
with
a
type
DB
-
15
removable
element
.
These
parts
are
all
bolted
in
the
compartment
,
and
of
course
,
the
type
DB
-
15
stationary
primary
disconnecting
devices
must
be
used
in
such
a
modified
compartment
.
For
the
V
SWITCHGEAR
HAVING
TYPES
DB
-
15
AND
DB
-
25
CIRCUIT
BREAKERS
Interlocks
.
The
front
hinged
door
of
the
cir
-
cuit
breaker
compartment
is
interlocked
with
the
removable
element
so
that
the
circuit
breaker
will
automatically
trip
if
an
attempt
is
made
to
open
the
door
when
the
circuit
breaker
is
closed
.
This
The
general
features
of
type
DB
-
15
and
DB
-
25
4
rawout
switchgear
(
see
Fig
.
24
)
are
similar
to
those
plained
previously
for
the
type
DA
-
50
switch
-
However
,
there
are
no
separate
trucks
for
gear
.
18
\
rr
Courtesy of NationalSwitchgear.com
I
.
B
.
32
-
100
-
1
DESCRIPTION
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
cuit
breaker
if
an
attempt
is
made
to
move
th
element
into
the
"
operating
"
position
while
the
circuit
breaker
is
closed
.
This
interlock
also
pre
-
vents
closing
of
the
circuit
breaker
when
it
is
at
any
point
between
the
"
test
"
and
"
operating
"
positions
.
Before
the
removable
element
may
be
withdrawn
from
the
"
operating
"
position
,
the
lever
on
the
left
side
of
the
element
must
be
depressed
.
This
causes
the
positioning
pin
to
move
out
of
the
posi
-
tioning
slot
,
and
at
the
same
time
it
causes
the
circuit
breaker
to
trip
if
it
is
closed
.
Thus
the
element
cannot
be
withdrawn
from
the
"
operating
"
position
while
the
breaker
is
closed
.
Accessories
.
Standard
accessories
furnished
for
type
DB
-
25
switchgear
include
a
-
set
of
rail
extensions
and
a
levering
device
.
Figs
.
29
and
30
illustrate
the
manner
in
which
the
rail
extensions
are
used
in
completely
withdrawing
the
element
from
the
compartment
and
show
the
method
of
moving
the
element
into
,
or
out
of
,
the
"
operating
"
position
by
use
of
the
levering
device
.
There
are
no
accessories
required
for
switch
-
gear
having
type
DB
-
15
removable
elements
.
The
element
may
be
moved
into
,
or
out
of
,
the
"
operat
-
ing
"
position
without
the
use
of
the
levering
device
.
llgggaPaPlM
•
_
I
*
T
s
a
I
:
>
5
V
t
4
l
:
.
"
-
I
gpSTQI
s
a
m
.
•
K
m
m
a
m
*
£
.
.
%
<
3
>
-
'
l
-
'
s
.
y
-
rr
mm
sfeue
.
^
WK
!
(
.
-
*
-
-
r
M
r
I
IBMI
FIG
.
25
.
Compartment
for
Type
DB
-
15
Circuit
Breaker
interlock
also
prevents
closing
the
circuit
breaker
while
in
the
"
operating
"
position
with
the
door
With
the
removable
element
withdrawn
open
.
to
the
"
test
"
position
,
however
,
the
breaker
may
be
closed
with
the
compartment
door
open
.
An
interlock
between
the
compartment
and
the
removable
element
will
automatically
trip
the
cir
-
POSITIONING
DEVICE
-
s
-
_
r
:
-
:
-
3
»
LIFTING
BRACKET
.
£
2
-
'
GROUND
FINGER
-
MANUAL
OPERATING
HANDLE
WHEEL
FOR
SUPPORTING
REMOVABLE
ELEMENT
ON
MOVABLE
PORTION
OF
PRIMARY
DISCONNECTING
DEVICE
COMPARTMENT
RAILS
-
15
Circuit
Breaker
19
Courtesy of NationalSwitchgear.com
This manual suits for next models
4
Other Westinghouse Switch manuals
